Wearing-ring for centrifugal pumps.



PATENTED JULY 11, 1905.

E. MEDEN. WEARING RING FOR GENTRIPUGAL PUMPS.

APPLICATION I'ILEIQ JULY 21,1904.

INVENTOR g madam 6M fi I ATTORNEY M m0 m4 J UNTTED STATES Patented July11, 1905.

PATENT OEEIC ELOF MEDEN, OF NEW YORK, N. Y., ASSIGNOR TO DE LAVAL STEAMTURBINE COMPANY, A CORPORATION OF NEWV JERSEY.

WEARING-RING FOR CENTRIFUGAL PUMPS.

SPECIFICATION forming part of Letters Patent No. 794,185, dated. July11, 1905,

Application filed July 21, 1904:. Serial No. 217,584.

To all whom it may concern.-

Be it known that I, ELO'F MEDEN, of the city, county, and State of NewYork, have invented a new and useful Improvement in VVearing- Rings forCentrifugal Pumps, of which the following is a specification.

The invention relates to centrifugal pumps; and it consists in thecombination, with a rotary pump-wheel and a casing therefor having aninternal flange constructed to inclose the circumferential periphery ofsaid wheel, and a wearing-ring having an external circumferential groovereceiving said flange and interposed between said flange and said wheel.

In the accompanying drawings, Figure 1 is asection of acentrifugal pump,showing wearing-rings applied to both pump-wheel and casing on the linea: w of Fig. 2. Fig. 2 is a section on the line y 3/ of Fig. 1. Fig. 3shows separately the wearing-ring which is applied to the casing.

Similar numbers of reference indicate like parts.

The pump-casing is divided horizontally into two sections 1 and 2, whichare detachably secured by any suitable means. The inlet 3 and the outlet4 are formed in the lower section 2. The bearings 5 and 6 for thewheelshaft 7 are in both sections. The pumpwheel 8 of usual constructionis keyed on the shaft 7. Ordinarily within the casing-sections there areformed semicircular flanges 9 and 10, which inclose the pump-wheel andmake a joint with the periphery thereof. Between the meeting faces ofsaid flanges and of the wheel-periphery there is apt to be much wear,especially if the liquid pumped contains grit or dirt. This soon resultsin undesirable leakage and frequently renders renewal of the casingnecessary. To obviate this difliculty,

I form on the periphery of the pump-wheel 8, at the ends thereof,inclined or outwardlytapering shoulders, upon which I placewearing-rings 11, of any suitable metal, such as bronze. The rings 11may be driven tightly upon the tapering shoulders, and so secured inplace.

Surrounding the rings 11 are rings 12, having an external groove formedaround their circumferences, which groove receives the flanges 9 and 10.The inner circumferential faces of the rings 12 bear upon the outercircumferential faces of the rings 11, and hence the frictional wear dueto the rotation of the pump-wheel 8 comes on said rings.

In assembling the parts the rings 12 are placed upon the rings 11, andthe upper casing-section 1 being removed the flanges 9 and 10 are seatedin the groove 13 of the rings 12. The upper section 1 is then placed inposition. It will be obvious that the wearingrings are easily removablewhenever worn, so that new ones can be substituted. In this way theeffective lifetime of the pump is greatly increased. The object ofseating the flanges 9 and 10 in the groove of rings 12 is to preventlateral displacement of said rings.

I do not claim herein in combination with a single rotary pump-wheel acasing therefor having openings in its opposite sides, wearing-ringssecured in said openings, and wearing-rings secured on saidwheel-periphery and received in said first-named wearingrings, thebearing-surfaces being parallel to the axis of said wheel, inasmuch asthe same is claimed by me in another pending application, Serial No.217,583, filed July 21, 1904.

I claim 1. In combination with a rotary pumpwheel and a casing thereforhaving an internal flange constructed to inclose the circumferentialperiphery of said wheel, a wearing-ring having an externalcircumferential groove receiving said flange and interposed between saidflange and said'wheel.

2. In combination with a rotary pumpwheel, a casing thereforhorizontally divided into an upper and lower section and providedinternally with a flange constructed to inclose the circumferentialperiphery of said wheel, a wearing-ring having an externalcircumferential groove receiving said flange and interposed between saidflange and said wheel.

3. In combination with a rotary pumpwheel and a casing therefor havingan internal In testimony whereof I have signed my name flangeconstructed to inclose the circumferento this specification in thepresence of two subtial periphery of said Wheel, a Wearing-ring scribingWitnesses.

having an external circumferential groove re- ELOF MEDEN. 5 ceiving saidflange and a second Wearing-ring Vvltnesses:

secured upon said Wheel and disposed withm GEO. R. REMINGTON,

said first-named ring. GEo. D. TALLMAN.

